["Army of the Potomac""History""Medical and sanitary affairs""Medical care""Regimental histories""United States Civil War1861-1865""United States""Personal narratives""United States. Army of the Potomac""Military Hygiene""Military Medicine""American Civil War1861-1865""United stateshistorycivil war1861-1865regimental histories""United stateshistorycivil war1861-1865medical care""United statesarmysanitary affairs"]